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2 years ago

How many ways are there to distribute n graded homeworks to n students such that none of them gets their own homework back?

1 answer:

8 0

Assume N students

Student 1 can get (n-1) papers
Student 2 can get (n-1) papers
Student 3 can get (n-1) papers
etc
Student N can get (n-1) papers

So for N students you can have N(n-1)

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mt. Everest, the highest elevation in aisa is 29,028 feet above sea level. the dead sea, the lowest elevation, is 1,312 feet bel

andre [41]

Answer:

27716

Step-by-step explanation:

27716!

lol

8 0

3 years ago

Read 2 more answers

Find the surface area of a right cone with diameter 30 in. and slant height 8 in.Your answerEXTRA CREDIT: Find the surface area

Anon25 [30]

Answer:

Surface area = 1084 in²

Step-by-step explanation:

To find the surface area of a right cone, we can use the following formula:

$\boxed{{Area = \pi r^2 + \pi rl}}$ ,

where:

• r = radius

• l = slant height.

In the question, we are told that the diameter of the cone is 30 in. Therefore its radius is (30 ÷ 2 = ) 15 in. We are also told that its height is 8 in.

Using this information and the formula above, we can calculate the surface area of the cone:

Surface area = $\pi \times (15)^2 + \pi \times 15 \times 8$

= $345 \pi$

$\approx$ 1084 in²

6 0

1 year ago

PLSSS SOMEONE NEED HELP PLSSS!!!!

kakasveta [241]

The answer is the one piece .

7 0

2 years ago

Read 2 more answers

Factorise x^2-y^2-2x+6y-8

Talja [164]

X^2 - y^2 - 2x + 6y - 8
= (x^2 - 2x + 1) - (y^2 - 6y + 9) - 8 - 1 + 9 
= (x - 1)^2 - (y - 3)^2 
= [(x - 1) - (y - 3) ] [(x - 1) + (y - 3)] 
= (x - 1 - y + 3) ( x - 1 + y - 3) 
= (x - y + 2) (x + y - 4)

3 0

3 years ago

a mulberry silk worm can spit a single thread the measure up to 3,900 ft in length. write the number in scientific notation?

mafiozo [28]

When written in scientific notation, 3,900 = 3.9 x 10^3

6 0

3 years ago